328 



A. R. KRALL 



pH is about 7.0 at the lowest part of the dip near the center of the 

 cluting curve. The compound on the right has been designated "5a" 

 and that on the left "5b"; 5a is belie\^ed to be the reduced form of 5b. 



Changes in level of these materials respond to changes in external 

 conditions moi"e rapidly than docs the level of any other phosphate 



EFFECT OF DELAY IN KILLING ON LEVEL OF 5a 



/* 



/^.'^ 



t 



pH7 



¥\g. 1. Recorder traces illustrating separation of 5a and 5b. Increasing eluant 

 volume is to left. Upper trace darkened tissue — expt. 2, Table I; lower trace — 

 expt. 1, Table I. See text for complete explanation. 



